Screw-driver.



No. 802,248. PATENTED OCT. 17, 1905. H. TWARDOKS.

SGREW DRIVER.

APPLICATION FILED NOV.17. 1904.

UNTTFTT PATENT OFFICE.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed November 17,1904. Serial No. 283,212.

To (LZZ whom H; 12mg Pry/warn..-

Be it known that l, HENRY TWARDOKS, a citizen of the United States, residing at Meriden, in the county of New Haven and State of Connecticut, have invented new and useful Improvements in Screw-Drivers, of which the following is a specification.

This invention relates to screw-drivers or analogous tools, and has for its objects to produce a comparatively simple inexpensive device of this character in which liability of the tool-handle splitting is wholly obviated, one wherein the tool is detachably engaged with the handle and may be readily released to permit interchangeability, and one wherein the impact of a blow upon the tool will be transmitted throughout the entire handle.

To these ends the invention comprises the novel features of construction and combination of parts more fully described.

In the accompanying drawings, Figure 1 is a central longitudinal sectional elevation of a tool embodying the invention. Fig. 2 is a transverse section taken on the line 2 2 of Fig. 1. Fig. 3 is a perspective view of the handle-strengthening member. Fig. i is a perspective View of the handle-protecting member or disk. 7

Referring to the drawings, 1 designates the tool-handle, composed of wood or other suitable material and having a central longitudinal opening or bore 2, through which extends a steel strengthening member or rod 3, terminating at its inner end flush with the adjacent end, of the handle and having its outer end threaded, as at 5, for the reception of a metal head or disk 6, seated in a socket provided in the adjacent end of the hammer for its reception.

The handle 1 has its inner end reduced for the reception of a tubular metal ferrule 7 provided at a point beyond the end of the handle with a transverse opening 8 and having a longitudinal opening or socket 9 of non-circular form in cross-section and constituting a seat for the end of a tool-shank 10, the socket 9 being in endwisc alinement with the rod 3 and the end of the shank which seats in the socket being of a form in cross'section to conform to the latter and having a transverse recess or depression 11, adapted to register with the opening 8.

Arranged at the inner end of the handle 1, between the latter and the adjacent wall of the ferrule, is a disk-like protecting member or plate 12, which covers the entire end surface of the handle and is provided with a central projecting portion or neck 13, designed to'enter the adjacent end of the tool-receiving socket 9, the tool when in position being adapted to contact at its inner end with the projection 13.

Arranged within the opening 8 is a movable retaining member or button 14, having a central stud or projection 15, designed to enter the recess 11 for retaining the tool in engagement with the handle, the member 14.- being pressed to engaging position by means of a spring 16, acted upon by a tension-regulating member or screw 17, tapped into the end of the opening 8 and operable for varying the tension of the spring and for relieving tension on the latter to permit of disengagement of the member 14 from the shank.

In practice the end of the shank 10 is inserted in the socket 9 and automatically engaged by the member 1a to be thus securely held in place. WVhen the tool is in position, its inner end abuts, as before stated, against the disk 12 and is in alinement with the strengthening-rod 3, it being apparent from this construction and owing to the disk covering the entire end surface of the handle that a blow upon the outer end of the latter for driving the tool will be transmitted through the entire handle, thus minimizing shocks to the hand of the operator and obviating liability of the handle splitting. It is also apparent that in hammering upon the end of the handle the blows will be received upon the head 6 and transmitted from the latter, through the medium of the rod 3 and disk, directly to the tool. 10. It will be observed that the tool may be readily released from the handle, thus to permit of tools being quickly interchanged.

From the foregoing it is apparent that I produce a comparatively simple device which in practice will efficiently perform its functions to the attainment of the ends in view, it being understood that minor changes in the details herein set forth may be resorted to without departing from the spirit of the invention.

Having thus described the invention, What ner end of the socket, said disk covering the is claimed as new is entire end area of the handle. 10

In a device of the class described, a tool- In testimony whereof Iaflix my signature in handle, a ferrule seated upon one end thereof presence of two Witnesses. 5 and provided with a tool-socket, and apro- HENRY Tl/VARDOKS.

tecting-disk disposed between the end of the l/Vitnesses: handle and the adjacent wall of the ferrule WALTER HENRY TOELLE,

and having a portion projecting into the ini ARTHUR H. GARDNER. 

